A 40-GHz 4-Bit Digitally Controlled VGA with Low Phase Variation Using 65-nm CMOS Process

Jeng Han Tsai, Chia Lung Lin

Research output: Contribution to journalArticle

Abstract

A 40-GHz variable gain amplifier (VGA) with 4-bit digital gain control and low phase variation is designed and fabricated on the 65-nm CMOS process. The digital gain control mechanism is achieved using the presented digital version current steering topology. The measured gain of the VGA is between 22 and 6 dB at 40 GHz with 16 different linear-in-decibel gain states. Using the proposed two-stage digital version current steering VGA phase compensation technique, the measured phase variation is 3.18° within a 16-dB gain control range (GCR) and the root mean square (rms) phase error is 0.89° at 40 GHz.

Original languageEnglish
Article number8856253
Pages (from-to)729-732
Number of pages4
JournalIEEE Microwave and Wireless Components Letters
Volume29
Issue number11
DOIs
Publication statusPublished - 2019 Nov

Fingerprint

Gain control
CMOS
amplifiers
Topology
trajectory control
Variable gain amplifiers
root-mean-square errors
phase error
topology

Keywords

  • Current steering
  • digital control
  • low phase variation
  • millimeter-wave (MMW)
  • variable gain amplifier (VGA)

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

A 40-GHz 4-Bit Digitally Controlled VGA with Low Phase Variation Using 65-nm CMOS Process. / Tsai, Jeng Han; Lin, Chia Lung.

In: IEEE Microwave and Wireless Components Letters, Vol. 29, No. 11, 8856253, 11.2019, p. 729-732.

Research output: Contribution to journalArticle

@article{ccb18eaf24ad49efb535a0a3a681d65d,
title = "A 40-GHz 4-Bit Digitally Controlled VGA with Low Phase Variation Using 65-nm CMOS Process",
abstract = "A 40-GHz variable gain amplifier (VGA) with 4-bit digital gain control and low phase variation is designed and fabricated on the 65-nm CMOS process. The digital gain control mechanism is achieved using the presented digital version current steering topology. The measured gain of the VGA is between 22 and 6 dB at 40 GHz with 16 different linear-in-decibel gain states. Using the proposed two-stage digital version current steering VGA phase compensation technique, the measured phase variation is 3.18° within a 16-dB gain control range (GCR) and the root mean square (rms) phase error is 0.89° at 40 GHz.",
keywords = "Current steering, digital control, low phase variation, millimeter-wave (MMW), variable gain amplifier (VGA)",
author = "Tsai, {Jeng Han} and Lin, {Chia Lung}",
year = "2019",
month = "11",
doi = "10.1109/LMWC.2019.2942013",
language = "English",
volume = "29",
pages = "729--732",
journal = "IEEE Microwave and Wireless Components Letters",
issn = "1531-1309",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "11",

}

TY - JOUR

T1 - A 40-GHz 4-Bit Digitally Controlled VGA with Low Phase Variation Using 65-nm CMOS Process

AU - Tsai, Jeng Han

AU - Lin, Chia Lung

PY - 2019/11

Y1 - 2019/11

N2 - A 40-GHz variable gain amplifier (VGA) with 4-bit digital gain control and low phase variation is designed and fabricated on the 65-nm CMOS process. The digital gain control mechanism is achieved using the presented digital version current steering topology. The measured gain of the VGA is between 22 and 6 dB at 40 GHz with 16 different linear-in-decibel gain states. Using the proposed two-stage digital version current steering VGA phase compensation technique, the measured phase variation is 3.18° within a 16-dB gain control range (GCR) and the root mean square (rms) phase error is 0.89° at 40 GHz.

AB - A 40-GHz variable gain amplifier (VGA) with 4-bit digital gain control and low phase variation is designed and fabricated on the 65-nm CMOS process. The digital gain control mechanism is achieved using the presented digital version current steering topology. The measured gain of the VGA is between 22 and 6 dB at 40 GHz with 16 different linear-in-decibel gain states. Using the proposed two-stage digital version current steering VGA phase compensation technique, the measured phase variation is 3.18° within a 16-dB gain control range (GCR) and the root mean square (rms) phase error is 0.89° at 40 GHz.

KW - Current steering

KW - digital control

KW - low phase variation

KW - millimeter-wave (MMW)

KW - variable gain amplifier (VGA)

UR - http://www.scopus.com/inward/record.url?scp=85077499283&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85077499283&partnerID=8YFLogxK

U2 - 10.1109/LMWC.2019.2942013

DO - 10.1109/LMWC.2019.2942013

M3 - Article

AN - SCOPUS:85077499283

VL - 29

SP - 729

EP - 732

JO - IEEE Microwave and Wireless Components Letters

JF - IEEE Microwave and Wireless Components Letters

SN - 1531-1309

IS - 11

M1 - 8856253

ER -